/* 页脚与头图透明 */
#footer {
  background: transparent !important;
}
#page-header {
  background: transparent !important;
}

/* 白天模式遮罩透明 */
#footer::before {
  background: transparent !important;
}
#page-header::before {
  background: transparent !important;
}

/* 夜间模式遮罩透明 */
[data-theme="dark"] #footer::before {
  background: transparent !important;
}
[data-theme="dark"] #page-header::before {
  background: transparent !important;
}
/* 欢迎信息 */
#welcome-info {
  background: linear-gradient(45deg, #b9f4f3, #e3fbf9);
  border-radius: 18px;
  padding: 8px;
}
[data-theme="dark"] #welcome-info {
  background: #212121;
}